JP6198586B2 - Dial and automobile meter provided with the dial - Google Patents

Description

  The present invention relates to a dial plate and an automotive meter provided with the dial plate.

Metallic dials manufactured by resin molding and metal film formation are used in automobile meters in order to give the viewer a sense of quality by imparting a metallic texture to the resin dial (Patent Document 1). 2).
The ring decoration structure in Patent Document 1 has a tapered shape on the upper surface side of a ring decoration member that exhibits an annular shape, and is inclined toward the outer diameter direction, and as a design surface that exhibits a substantially annular shape when viewed from the front. A decorative surface portion is provided. In the decorative surface portion, a plurality of stepped portions that are lowered outward are provided in a step shape with substantially constant intervals and extending along the circumferential direction over substantially the entire circumference. On these stepped portions, a metal vapor deposition film layer such as aluminum or chromium is provided, and a hairline decoration portion simulating a metal hairline is formed.

  In the metal tone dial in Patent Document 2, a metal layer is formed on a resin dial main body, and a portion other than the first inner inclined surface and the outer inclined surface on the dial main body has a textured shape or a spin hairline. Unevenness such as a shape is provided.

JP 2008-89463 A JP 2013-40773 A

  However, the surface with spin weight (for example, the annular surface along the outer circumference of a circular dial), such as the decorative surface portion in the ring decoration structure described above and the dial main body in the metal tone dial, A mirror-finished chamfered surface (inner peripheral side chamfered surface, outer peripheral side chamfered surface) is connected inside and outside in the radial direction. A dial plate obtained by resin molding may have a spin basis weight and a boundary (connection structure) of the chamfered surface different from an image of a real metal chamfering process. For this reason, it may not be possible to obtain the same appearance as a metal cut product, and may not be able to sufficiently meet the appearance requested by a user who desires a metallic tone.

  The present invention has been made in view of the above situation, and the object thereof is a resin product, but has the appearance of being produced by cutting a real metal, is cheaper than a metal cut product, and An object of the present invention is to provide a dial plate that can be easily mass-produced and an automobile meter provided with the dial plate.

The above object of the present invention is achieved by the following configuration.
(1) A dial substrate that is formed in a circular shape by resin molding and has an outer peripheral inclined surface that is formed on the outer peripheral edge and has a spin basis weight centered on a circular center, and a surface of the dial substrate. A metal thin film to be formed, a plurality of stepped portions formed in a stepwise manner along the outer peripheral inclined surface, and a plurality of stepped portions along the outer peripheral inclined surface in order to form the spin basis weight; An outer peripheral side chamfer formed and connected to the horizontal surface.

  According to the dial having the above configuration (1), the outer peripheral inclined surface is formed on the outer peripheral edge of the circular dial plate. A spin basis weight is formed on the outer peripheral inclined surface. In the spin basis weight, a plurality of step portions composed of a horizontal plane and a vertical plane are connected in a staircase pattern along the outer peripheral inclined surface. Furthermore, an outer peripheral side chamfering surface is continuously formed on the radially outer side of the outer peripheral inclined surface. This outer peripheral side chamfer is connected to a horizontal surface with a spin basis weight in which a plurality of stepped portions are connected in a staircase pattern. That is, the horizontal surface of the lowermost step is connected to the outer peripheral side chamfer that is inclined downward. Thereby, the boundary between the spin basis weight and the outer peripheral side chamfering surface looks as if it is seen in the chamfering of real metal processing.

(2) The dial having the above-described configuration (1), further comprising an inner peripheral chamfer formed continuously on the radially inner side of the outer peripheral inclined surface and connected to the vertical surface. Dial.

  According to the dial having the configuration of (2) above, the spin weight formed on the outer peripheral inclined surface is connected to the inner peripheral side surface. This inner peripheral side chamfer is connected to a vertical surface with a spin basis weight in which a plurality of step portions are connected in a staircase pattern. That is, the vertical surface of the uppermost step is connected to the inner peripheral side chamfering surface that is inclined downward in the radial direction. Thereby, the boundary between the spin basis weight and the inner peripheral side chamfered surface becomes an edged shape, and it looks like a real metal processing chamfer.

(3) The dial having the above-described configuration (1) or (2), wherein each of the stepped portions with the spin weight is formed to extend along a concentric circle with the circular center as a center. A dial characterized by that.

  According to the dial having the configuration (3), each step is formed in a plurality of concentric circles. As a result, when the stepped portion is formed in a spiral shape (ie, the molding surface of the molding die is cut and formed) as in a single stroke, the horizontal surface does not gradually decrease or increase at the start and end of cutting. As a result, a highly accurate edge is reliably formed at the boundary between the spin weight and the outer peripheral side chamfer and between the spin weight and the inner peripheral side chamfered surface, and the appearance as seen in real metal processing chamfering is obtained.

(4) An automobile meter comprising the dial plate having any one of the constitutions (1) to (3).

  According to the automobile meter having the configuration of the above (4), the dial plate is a resin product, but has the appearance of being manufactured by cutting a real metal, and can make the viewer feel a sense of quality. it can.

  According to the dial plate and the automobile meter provided with the dial plate according to the present invention, although it is a resin product, it has the appearance of being manufactured by cutting a real metal, and is less expensive than a metal cut product. And can be easily mass-produced.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

(A) is the principal part expanded sectional view of the boundary of a spin weight and the outer peripheral side chamfering surface in the dial which concerns on one Embodiment of this invention, (b) is the principal part expanded cross section of the boundary of a spin weight and an inner peripheral side chamfering surface. FIG. It is a front view of a meter for cars provided with a dial shown in Drawing 1. FIG. 3 is an enlarged view of the speedometer shown in FIG. 2. It is AA sectional drawing of FIG. (A) is the B section enlarged view of FIG. 4, (b) is the C section enlarged view of FIG. (A) The principal part expanded sectional view of the boundary of the spin weight of the dial which concerns on a comparative example, and an outer peripheral side chamfering surface, (b) The principal part expansion of the boundary of the spin weight of the dial which concerns on a comparative example, and an inner surface chamfering surface It is sectional drawing.

Embodiments according to the present invention will be described below with reference to the drawings.
The dial plate 11 according to an embodiment of the present invention can be suitably used for, for example, an automobile meter (such as a speedometer 15 or a tachometer 17) of the vehicle combination meter 13 shown in FIG.

  The vehicle combination meter 13 includes a case (not shown), a speedometer 15, a fuel gauge 19, a tachometer 17, a water temperature gauge 21, a shift display section 23, a turn display section 25, and a multi display section 27. And comprising. For example, the speedometer 15 and the tachometer 17 have an internal unit (not shown) fixed to a wiring board. A rotary shaft (not shown) of the pointer 29 protrudes from the internal unit. A dial 31 is attached to the case (not shown). The dial 31 covers a wiring board (not shown), an internal unit, and the like, and exposes the various meters from the opening. The front side of the facing 31 is further covered with a transparent cover 33 attached to the case.

A speedometer 15 and a tachometer 17 as an automobile meter have a dial plate 11 shown in FIG. Since the dial 11 of the speedometer 15 and the tachometer 17 have substantially the same configuration, the dial 11 of the speedometer 15 will be described below as a representative example.
The dial 11 includes a disc-shaped central disc portion 35 (see FIG. 2) in which a shaft hole is formed, and an annular portion 37 disposed outside the central disc portion 35. The annular portion 37 has a dial substrate 39 formed in an annular shape by resin molding. Note that the dial 11 may be formed in a disc shape in which the central disc portion 35 and the annular portion 37 are integrated.

  On the annular flat plate portion 41 inside the dial substrate 39, scale projections 43 project at predetermined intervals in the circumferential direction. The dial substrate 39 is transparent and functions as a light guide plate. The guided light is emitted from the protruding end surface of the scale protrusion 43. On the outer side of the annular flat plate portion 41, an annular fine scale surface 45 is continuously provided with an upward inclination. On the outer side of the fine scale surface 45, an annular steep surface 47 having a steep upward slope is continuously provided.

  An outer peripheral inclined surface 49 is formed on the outer peripheral edge of the dial substrate 39 (steep surface 47). A spin basis weight 51 is formed on the outer peripheral inclined surface 49 with the circular center of the dial 11 as the center. A ring-shaped frame wall 53 is continuously provided outside the outer peripheral inclined surface 49. On the outer peripheral inclined surface 49 to which the spin weight 51 is attached, speed characters 55 are provided at predetermined intervals along the circumferential direction.

  As shown in FIG. 1, the spin basis weight 51 is configured by a plurality of stepped portions 57 that are arranged in a staircase pattern along the outer peripheral inclined surface 49. Each step 57 includes a horizontal plane 59 and a vertical plane 61 that are orthogonal to each other.

On the radially outer side of the outer peripheral inclined surface 49, an outer peripheral side chamfer 63 shown in FIG. The outer peripheral side chamfered surface 63 is connected to a horizontal surface 59 in the step portion 57 of the spin weight 51 as shown in FIG. Further, an inner peripheral side chamfer 65 shown in FIG. 5B is continuously formed on the radially inner side of the outer peripheral inclined surface 49. The inner peripheral side chamfered surface 65 is connected to the vertical surface 61 of the stepped portion 57 of the spin weight 51 as shown in FIG.
Further, each step 57 of the spin weight 51 is formed to extend along a concentric circle with the circular center of the dial 11 as the center.

  A metal thin film 90 is formed on the surface of the dial substrate 39. The metal thin film 90 is formed by plating, sputtering, or the like. The metal thin film 90 by plating forms a nickel coating, a chromium coating, a ruthenium coating, a rhodium coating, or the like on the surface of the dial substrate 39 by, for example, a wet plating method. The metal thin film 90 by sputtering is formed by placing a metal to be applied as a metal film in a vacuum chamber as a target and colliding with a rare gas element (such as argon) or nitrogen ionized by applying a high voltage.

  In this embodiment, the step part 57 of the spin weight 51 is formed by being transferred from a mold weight molding surface on a molding surface of a molding die (not shown). A plurality of molding dies for molding the annular portion 37 are manufactured for each production base. At this time, processing information for manufacturing the molding die is stored in the processing machine as common processing data. As this processing machine, for example, an NC (Numerical Control) milling machine can be used. The machining data is obtained by quantifying the position of the mold material, the movement of the spindle, and the like. As a result, the spin weight 51 in the annular portion 37 is formed in a uniform shape even when transferred from the mold weight molding surface of an arbitrary molding die.

  Further, as the synthetic resin for forming the dial plate 39 of the annular portion 37, a resin having fluidity excellent in transferability is used. As the synthetic resin excellent in transferability, a thermoplastic plastic such as cycloolefin polymer resin (COP) can be suitably used. As a result, the synthetic resin for molding the annular portion 37 can faithfully transfer the spin basis weight pattern formed on the mold basis weight molding surface to the dial substrate 39 of the annular portion 37.

Next, the operation of the dial plate 11 having the above configuration will be described.
In the dial 11 of the speedometer 15 according to the present embodiment, an outer peripheral inclined surface 49 is formed on the outer peripheral edge of the circular dial plate substrate 39 as shown in FIG. 1A. . A spin basis weight 51 is formed on the outer peripheral inclined surface 49.

  In the spin basis weight 51, a plurality of step portions 57 including a horizontal surface 59 and a vertical surface 61 are connected in a stepped manner along the outer peripheral inclined surface 49. Further, an outer peripheral side chamfered surface 63 is formed continuously outside the outer peripheral inclined surface 49 in the radial direction. The outer peripheral side chamfer 63 is connected to a horizontal surface 59 of the spin weight 51 in which a plurality of step portions 57 are connected in a step shape. That is, the horizontal surface 59 of the lowermost stepped portion 57 is connected to the outer peripheral side chamfering surface 63 that is inclined downward. As a result, the boundary 67 between the spin weight 51 and the outer peripheral side chamfered surface 63 looks as if it is seen in real metal processing chamfering.

  On the contrary, when the vertical surface 61 of the lowermost stepped portion 57 is connected to the outer peripheral side chamfering surface 63 inclined downward as in the spin basis weight 51A shown in the comparative example of FIG. 6A, the boundary rises. (With the rising portion 71). This excitement creates a sense of incongruity when cutting real metal. As a result, the user may not recognize the chamfered appearance. According to the configuration of the spin weight 51 of this embodiment, such a sense of incongruity does not occur.

  Further, in the dial 11 of the speedometer 15 of the present embodiment, the spin weight 51 formed on the outer peripheral inclined surface 49 is connected to the inner peripheral side surface 65 as shown in FIG. The inner peripheral side chamfered surface 65 is connected to the vertical surface 61 of the spin weight 51 in which a plurality of stepped portions 57 are arranged in a staircase pattern. That is, the vertical surface 61 of the uppermost stepped portion 57 is connected to the inner peripheral side chamfering surface 65 that is inclined downward in the radial direction. As a result, the boundary 69 between the spin weight 51 and the inner peripheral side chamfered surface 65 has a sharp edge shape, and looks like a real metal processing chamfer.

  6B, when the horizontal surface 59 of the uppermost stepped portion 57 is connected to the inner peripheral side chamfering surface 65 that is inclined downward, the included angle becomes an obtuse angle. And the edge is less likely to appear (the sharpness is lost). The border 73 without the edge gives a sense of incongruity to the case of cutting a real metal. As a result, the user may not recognize the chamfered appearance. According to the configuration of the spin weight 51 of this embodiment, such a sense of incongruity does not occur.

Furthermore, in the dial 11 of the speedometer 15 of the present embodiment, each step portion 57 is formed in a plurality of concentric circles. As a result, when the stepped portion 57 is formed in a spiral shape as in a single stroke writing (that is, the molding surface of the molding die is cut and formed), the horizontal surface 59 does not gradually decrease or increase when the cutting is started. As a result, highly accurate edges are reliably formed at the boundary 67 and boundary 69 between the spin weight 51 and the outer peripheral side chamfer 63, and between the spin weight 51 and the inner peripheral side chamfer 65, which is seen in chamfering of real metal processing. It looks like you can.
Therefore, according to the speedometer 15 of the present embodiment, although the dial 11 is a resin product, it has an appearance as if it is manufactured by cutting a real metal, and makes the viewer feel a sense of quality. it can.

Here, the features of the dial plate according to the present invention and the embodiment of the automobile meter provided with the dial plate will be briefly summarized below.
[1] A dial substrate 39 that is formed in a circular shape by resin molding and has a spin weight 51 centered on a circular center on an outer peripheral inclined surface 49 that is formed on the outer peripheral edge. A thin metal film 90 formed on the surface of the substrate, a plurality of step portions 57 which are composed of a horizontal surface 59 and a vertical surface 61 to form the spin basis weight 51 and which are continuous in a step shape along the outer peripheral inclined surface 49, and the outer periphery A dial plate 11 for an automobile meter, comprising: an outer peripheral side chamfering surface 63 continuously formed on the outer side in the radial direction of the inclined surface 49 and connected to the horizontal surface 59.
[2] A dial plate 11 for an automobile meter having the above-described configuration [1], which is formed continuously on the radially inner side of the outer peripheral inclined surface 49 and connected to the vertical surface 61. A dial 11 comprising 65.
[3] The dial plate 11 having the above-described configuration [1] or [2], wherein each of the stepped portions 57 of the spin weight 51 extends along a concentric circle centered on the circular center. The dial 11 is characterized by being made.
[4] A car meter (speedometer) 15 including the dial plate 11 having any one of the above-described [1] to [3].

Therefore, according to the dial plate 11 of the meter for automobiles according to the present embodiment, it has the appearance that it is manufactured by cutting a real metal while being a resin product, and is cheaper than a metal cut product, And mass production is easy.
In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

11 ... Dial 15 ... Speedometer (automobile meter)
39 ... Dial plate 49 ... Outer peripheral inclined surface 51 ... Spin weight 57 ... Step 59 ... Horizontal surface 61 ... Vertical surface 63 ... Outer peripheral side chamfer 65 ... Inner peripheral side chamfer 90 ... Metal thin film

Claims (4)

A dial substrate that is formed in a circular shape by resin molding and has a spin basis weight centered on a circular center on an outer peripheral inclined surface that is formed on the outer peripheral edge and goes down to the outside;
A metal thin film formed on the surface of the dial substrate;
A plurality of stepped portions formed of a horizontal surface and a vertical surface to form the spin basis weight and connected in a staircase pattern along the outer peripheral inclined surface;
An outer peripheral side chamfer formed continuously on the radially outer side of the outer peripheral inclined surface and connected to the horizontal plane;
A dial characterized by comprising. The dial according to claim 1,
A dial comprising an inner peripheral side chamfer formed continuously on the radially inner side of the outer peripheral inclined surface and connected to the vertical surface. The dial according to claim 1 or 2,
The dial according to claim 1, wherein each step portion of the spin weight is formed to extend along a concentric circle with the circular center as a center. An automobile meter comprising the dial according to any one of claims 1 to 3.

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